本文選題：天然氣　切入點(diǎn)：壓縮因子　出處：《東北石油大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：近年來(lái),天然氣在我國(guó)能源戰(zhàn)略中的地位逐步提升,所以天然氣在各種壓力和溫度下的壓縮因子是氣藏工程和采氣工藝中必需的基本數(shù)據(jù),也是物質(zhì)平衡計(jì)算,氣藏儲(chǔ)量計(jì)算的重要依據(jù)。在當(dāng)下天然氣的發(fā)展戰(zhàn)略中,如何在天然氣儲(chǔ)存、管輸、加工的工藝計(jì)算中對(duì)天然氣壓縮因子的準(zhǔn)確確定就顯得尤為重要。根據(jù)查閱文獻(xiàn)和過(guò)往科研實(shí)踐,天然氣壓縮因子大致可通過(guò)以下幾種方式確定:1,通過(guò)測(cè)定儀器;2,通過(guò)狀態(tài)方程計(jì)算壓縮因子;3,用經(jīng)驗(yàn)公式計(jì)算壓縮因子;4,用Standing-Katz圖版確定壓縮因子。其中運(yùn)用經(jīng)驗(yàn)公式是最常見的壓縮因子計(jì)算方式。本文通過(guò)對(duì)Dranchuk-Purvis-Robinson方法、Brill-Beggs方法、Redlich-Kwong方法、Hall-Yarborough方法和Gopal方法這5種方法的優(yōu)選,選擇出最常用的方法,并從這些常用的方法中找到最為精確的計(jì)算方法,經(jīng)過(guò)對(duì)比后發(fā)現(xiàn):1,如要使用計(jì)算機(jī)計(jì)算Z值時(shí),應(yīng)選用Dranchuk-Purvis-Robinson、Hall-Yarborough方法;2,如果要用人工計(jì)算Z值時(shí)則Gopal方法最為適合;3,AGA8-92DC方程與SGERG-88方程對(duì)于壓縮因子計(jì)算雖然有很高的精度,但是對(duì)氣體已知條件的要求相對(duì)于以上五種經(jīng)驗(yàn)公式來(lái)說(shuō)要高,所以在已知條件不能滿足計(jì)算時(shí),這兩種方法的使用不如經(jīng)驗(yàn)公式計(jì)算簡(jiǎn)單便捷。通過(guò)Microsoft Visual Basic 6.0編制天然氣壓縮因子計(jì)算軟件的平均相對(duì)誤差可以滿足工程要求。隨后對(duì)已知?dú)怏w組分及壓縮因子系數(shù)的兩個(gè)氣樣使用AGA8-92DC方程計(jì)算兩種氣樣的壓縮因子系數(shù),判斷AGA8-92DC方程是否適合用于這兩種氣樣的壓縮因子計(jì)算。經(jīng)過(guò)計(jì)算,使用AGA8-92DC方程計(jì)算管輸天然氣開發(fā)后期的低中壓含碳貧氣氣藏準(zhǔn)確性仍可以滿足要求。計(jì)算含H2S等酸性組分氣體的壓縮因子系數(shù)時(shí),AGA8-92DC方程計(jì)算出的壓縮因子系數(shù)與實(shí)際測(cè)量值相比,在每個(gè)壓力值下計(jì)算值均大于實(shí)測(cè)值,平均相對(duì)誤差過(guò)大,所以AGA8-92DC方程不適宜計(jì)算含H2S等酸性組分氣體的壓縮因子系數(shù)。最后通過(guò)使用天然氣壓縮因子的計(jì)算方法結(jié)合貝格斯-布里爾方法,計(jì)算出管道條件下氣體的體積流量,雷諾數(shù)和壓降,經(jīng)過(guò)計(jì)算所得誤差為8.15%,滿足工程需要,且計(jì)算壓降誤差小于Z值為1的情況。
[Abstract]:In recent years, the status of natural gas in China's energy strategy has gradually increased, so the compression factor of natural gas at various pressures and temperatures is the basic data necessary for gas reservoir engineering and gas recovery technology, and is also the calculation of material balance. Important basis for calculation of gas reservoir reserves. In the current natural gas development strategy, how to store and pipeline natural gas, It is particularly important to determine the compression factor of natural gas in the process calculation. The compression factor of natural gas can be determined roughly by the following ways: 1: 1, by measuring instrument 2, calculating compression factor 3 by equation of state, calculating compression factor 4 by empirical formula, and determining compression factor by Standing-Katz chart plate. The formula is the most common method for calculating the compressibility factor. In this paper, we select the Dranchuk-Purvis-Robinson method, Brill-Beggs method, Redlich-Kwong method, Hall-Yarborough method and Gopal method. Choose the most commonly used methods, and find the most accurate calculation method from these common methods. After comparison, we find that when you want to use a computer to calculate the Z value, The Dranchuk-Purvis-Robinson Hall-Yarborough method should be used. If the Z value is to be calculated manually, the Gopal method is most suitable for the calculation of compressibility factor, though the Gopal equation and the SGERG-88 equation are most suitable for the calculation of the compressibility factor, although the Dranchuk-Purvis-Robinsonian Hall-Yarborough method is the most suitable for the calculation of the compressibility factor. However, the requirements for the known conditions of gases are higher than those for the above five empirical formulas, so when the known conditions do not satisfy the calculation, The application of these two methods is not as simple and convenient as the empirical formula. The average relative error of natural gas compression factor calculation software compiled by Microsoft Visual Basic 6.0 can meet the engineering requirements. Subsequently, the known gas components and compressibility factors are obtained. The compressibility factor of two gas samples is calculated by AGA8-92DC equation. To determine whether the AGA8-92DC equation is suitable for calculating the compressibility factors of these two gas samples. The accuracy of using AGA8-92DC equation to calculate the low and medium pressure carbon-rich gas reservoirs in the later stage of pipeline gas development can still meet the requirements. When calculating the compressibility factor coefficients of acidic gases such as H _ 2S, the compressibility coefficient calculated by the AGA _ 8-92DC equation is similar to that calculated by the AGA _ 8-92DC equation. Compared with the actual measured values, At each pressure value, the calculated value is larger than the measured value, and the average relative error is too large. Therefore, the AGA8-92DC equation is not suitable for calculating the compressibility factor coefficients of gases containing acid components such as H _ 2S. Finally, the volume flow rate of gas under pipeline conditions is calculated by using the natural gas compression factor calculation method combined with the Berges-Brier method. The Reynolds number and pressure drop are calculated with an error of 8.15, which meets the engineering requirements, and the calculated pressure drop error is less than Z value 1.
【學(xué)位授予單位】：東北石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TE832.3

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 唐蒙;;天然氣壓縮因子的計(jì)算[J];石油與天然氣化工;1987年01期

，

本文編號(hào)：1639100